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optical sensing

(Encyclopedia)optical sensing, in general, any method by which information that occurs as variations in the intensity, or some other property, of light is translated into an electric signal. This is usually accompl...

Gujrat

(Encyclopedia)Gujrat go͝ojərätˈ [key], city, NE Pakistan. It is near the Chenab River and on a major road ...

Youngstown

(Encyclopedia)Youngstown, city (1990 pop. 95,732), seat of Mahoning co., NE Ohio, near the Pa. line; founded 1797, inc. 1849. It was formerly a major U.S. iron and steel center. In the 1970s many of the steel mills...

ignition

(Encyclopedia)CE5 Ignition system ignition, apparatus for igniting a combustible mixture. The German engineer Nikolaus A. Otto, in his first gas engine, used flame ignition; another method was heating a metal t...

Zeami Motokiyo

(Encyclopedia)Zeami Motokiyo zāˈäˈmē mōˈtōˈkēˈyō [key] or Kanze Motokiyo, c.1363–c.1443, Japanese actor, playwright, and drama theorist. Son of the itinerant actor Kanami, at the age of eleven Zeami a...

foreign exchange

(Encyclopedia)foreign exchange, methods and instruments used to adjust the payment of debts between two nations that employ different currency systems. A nation's balance of payments has an important effect on the ...

Spassky, Boris

(Encyclopedia)Spassky, Boris, 1937–, Soviet chess champion. A child prodigy, he became an international master at the age of 16 and in 1955, at age 18, he became an international grand master. Subsequently in int...

Alliance

(Encyclopedia)Alliance. 1 City, seat of Box Butte co., NW Nebr., in the High Plains; founded 1887 as Grand Lake, renamed and inc. 1888. Located in a farming and ranching region, it is a shipping c...

Biot, Jean Baptiste

(Encyclopedia)Biot, Jean Baptiste zhäN bätēstˈ byō [key], 1774–1862, French physicist, grad. École Polytechnique (1797). He taught mathematics at Beauvais before becoming (1800) professor of mathematical ph...

toxemia

(Encyclopedia)toxemia tŏksēˈmēə [key], disease state caused by the presence in the blood of bacterial toxins or other harmful substances. The effects of the bacterial toxins known as endotoxins are relatively ...